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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95fd29fc1804fc6ea6440a16a9b282e5593d5480a259acd66b660d15b57d1d39' 
  AND token = 'tMvcCRjLQXWt3Z2dxs/MtytXEgFtpWrsjQh+kOheBqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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