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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '156092b2556669e62213facf1e46f6af015c60bfc74472bc3fa59494e5f2e98b' 
  AND token = 'jxAhPxdY4pY6/nTJMDpqk/obBYjY6Isd8nDqjDcXRC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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