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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bd9e364694ce744aa5d6c9523eb72d01ff7682f4bd530afe2dd7a8dd1914c42e' 
  AND token = 'WRIGlD9erY92SfE0e4FKFRtxakUWi7kt7nCzuA7tucg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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