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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d94640c119b196b9f4de2986a22a65d9e2277033dc9aea5a22ae0dff6dfa5c9' 
  AND token = '9kkNHwb5UQXUvT8OIS/kl77sRt8lInG1pkZwn32orw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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