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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebe403192762452a3f9099db3a2ece0ebf4d1d65aeff63370c05e6f86851876c' 
  AND token = 'J0kcM0RLILlPRvpuG/R3lu0KWpDxvQ18Cy9bKCb62ZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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