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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54157af614b3ff2ed70f6993d76be1360077ea132b0e1131f2456ba953ad594c' 
  AND token = 'IyAgmbwrOf8lavvh8ne9Q43pDsVnYOF8+2ESfwew5h8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}