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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f23692652deb983f9e8098b23181d69c1e3dcb555ec1fab4f8bab51d986150fd' 
  AND token = 'j/PBXsxqxUQg4/y2ZiprNW3Yf1evk8x8L7ftWuc3/S8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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