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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '48062988bb2d597190a6c8c9a7bc7c5d65bdc89564645eb986642c8f1552af87' 
  AND token = 'qwEToesTQ/IoLAIV50mODmHBu1YKkyM7USv+D3cxME4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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