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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8832b0d197f38f435a03f750d04d9ecb6f825834c882047d2762aa6973b162ea' 
  AND token = 'B5yq4O13CWBx4Ne68ztje458q8/QsOhIHNO9M3WWtas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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