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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f84537addf5589018236c66010616643b6f5cc543c4f9e0a0cbc2c08e204427' 
  AND token = 'aObd1GPX2uVHH/KzmrANfy3CQvFaIdDSEH/fyDavdR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00089

JSON explain

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