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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85707d676c4d09f2f502c501e01de6844696ee6caae0b45fc536fb74ca86ecae' 
  AND token = 'MF5945gYxwEM2wwOATEpDUiM0rwup8KADkIErCWthXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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