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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56e07589e14b2315405916355e9b54f5ddca94b74f36ff4646c25fa99c89f190' 
  AND token = 'lpTC0KfFFGDw3Cs9OUWNB+ncxnQqi2ExyLjFa+9kP2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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