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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0eee0e700285733e209b0ad767ecafa05134691b828812c96a9512da76b1d31b' 
  AND token = 'lbGy8YFbnbU/8E1BQ9LRpniDaxkhkFS9QGjOwIpL1nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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