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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bfa824ef3dbab8f495e29af18c67fbd2151a14efc48c84a1c5547f3a761be24' 
  AND token = 'D/P7mzAEB8pSou9dfNX/XUzgI1X6P7FtR/dnGEKaDx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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