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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b2aedbb86b769fae7eb6bfb69be05511a9ec1e0efbcb5935503360e6175fdeab' 
  AND token = 'bWXF65tdoIM5Hq0E6unRdcwKaJgu1f38TzQEWgko/FQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00087

JSON explain

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