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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecca72c392b6129682fe13f6349b94840a9a91f730039e0c3280d042b6223738' 
  AND token = 'oT8HOaAony/pVk/LDOu4JkDLqg8AC5w9cM6DVS4K/MM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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