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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8194ae7a557bf42977daa78b82c7ec1e74ab65f8fd52eeda7cb7ad5484008f5b' 
  AND token = '01W2m1E0wkNvRZivTmwAOxVU/YLrRF2Qhu6fX5yK34M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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