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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8397a79a2e35283065842ef90a746158c74f98db97e83ff5580923a2086a4e0' 
  AND token = 'safpq7m1z4C7iTBuLLd9Ub6dU0C/a7V2AE0FsMgm9CQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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