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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07d4a7b9baaafe0fc45898af54c45b1929a79f742b90def32d3ada29e77e677c' 
  AND token = '/zKUpYgMXw93y9/+S9tvnpz1DrEE+khTdgJsuejbMsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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