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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1bae76467e0ab8da5ca2d11f5f4e3c3f9b2f22d5077904bdfb3fe25bb9bb14d0' 
  AND token = 'fBFIGZ2J25RgrPOvWkNMxaT5SXfK+dqpKNdcWR5/hQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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