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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f32e8faa684c50fa601473e18f14ed5d65cedfefe9750c631eacf59e6048fdc5' 
  AND token = 'CCmul6HvH/w0WVbmfYWW0zEBvNUvRjRLfw7Zfljq4Io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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