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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd58b4cf8d4d3aba0a680e0fb4fd8a567710f0619443393fa0b265641d4910418' 
  AND token = 'IPXAFNSSkQUp4VvqL/RUYL609FVQ1m4p7ZxDgfx28zA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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