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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b810ed303f15ee66a4e86a00fa0483a5647010d82e8e6254f6008ac2ea66023' 
  AND token = 'OPUK26A2K8DXx0W6TI10ezS2W1EAGXDzc5lY26dFgyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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