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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cf239929ee904b6b8d578f6615c8d2767c282501bf9533c9df264de0228f114' 
  AND token = 'n0nCaMswz1iuXL/ANZX6Gshn2L0JTYEDUx/OejsjN7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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