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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bff2258393f7b829c53baa1d84771964f50fbe2afa823fe7bec4207d91ea8e2' 
  AND token = 'b7hjFppafFRDP/85q4fbItZBVFMUKEyJosLGFQ5Olek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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