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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69a12c398af3b28bf2c2e44acba533af2a177e55e681c5aa043e1c72eca258f1' 
  AND token = 'fBlgrEF9qmbFs7x6RvHNIzxiKY14UZJM18KZg5MtUCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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