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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb9ef925ca83a56f2a28fc2a956ca61416765e4777c7d67cce12cc041141e048' 
  AND token = 'Ve9Nu4cFPpr/o3YQ6T/JCzehtdhly2kE91mdCIKFcYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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