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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e04d56fe95c1674d7c73563892509c916a13ac33a5f24e2b64caecef95e860f5' 
  AND token = 'q2oe2DPosuRafIMK2nfKiv0NQeQdBDrlsXeH7I3hYBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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