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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c30cfd4f4f3d8f4a3d78af3d3801e0abef6b47a0d40c706bdbd00445fb9b1dd8' 
  AND token = 'wcu8w3b+b61WOwk6cIulEwCvhYN8ntEPkhSXs2bwi2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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