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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bc0d6a0ca7654c052bf8a2ca8f719e6a99d772aebdf0e232e8d411e6f442cc8' 
  AND token = 'TBYVRKd2yFUDNOKYpvc1c2Ud9OQogTzrOh4POCdWxrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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