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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d9ece10dfdca79d3cf45f91b1b77fc5229e57150a16e073ea796e1b90d813ba' 
  AND token = 'pWeA2O4PwREL78WyKPR++1tfXJOJDW03cH72A2C9pv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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