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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3ddff078dfd88bd36e7ae7a0ffdb8a9ffe00467edd016da59733adcdc3bd19e7' 
  AND token = 'EFptXwjQAltaUXScPkClyA/G9GAVGMcpBqNFekEhVyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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