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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa1d3f2abc1fbc7b7a31b51db01e67287aeafdcf7c3bb0e1cab848e3e8b1a71b' 
  AND token = 'GROBVd+p21LKn0d+vO17864BbYCV98c/TLOqhi0hZCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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