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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0653841aa75aec97f3887e695f344bb7dff5d1fc95673ee294f28fee6c8192a0' 
  AND token = 'HP7g3VALagmYtZWf3+8Gc777r0WYinUJ2ho/+rwrZRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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