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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11adbd514f5e090a479d0b7429e1f6b0ec6e6cc7673062e3c7bfc97c55f08699' 
  AND token = 'hcnhyrjruKHLMclGuB4ebCqzWtJRBDQ/chyJCKw5y9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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