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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7f093b307335a8501d584a711a2031c0d3147dbce069ef5bf7d6f3f4e3840ff9' 
  AND token = 'vbCC7na0mTKsWRr4Y8HVFcWQfp58L0NHY2xOKhXUGY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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