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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd6176128818c704f10851619858c8706388a08a815a7425d3779ea2c58c6d2b' 
  AND token = 'uTWQdv1+thUTytz78iAP2VJ0Cz6c+k5dT3DVVC60U3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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