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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7dbd5dba403e40fa910170974c26b3f34ff8c60150078d358aa730dfc213b23e' 
  AND token = '9Pw187CXXX7JhcS7Sqvc5Kqp6E47Tw80jBAMB2alLEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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