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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a05e12588d3e00613b82fcb1866b62ba95e41738f6a50d5f1ea2c859ca8fcb5d' 
  AND token = '7SFRSxnQpOSzsp8zFcdy3fHGRSE71LMOKg6epUmnqds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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