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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1e4c155bc49b83bbbb6aeb6782c01c27b410324542db253c42c6dc0b089ece2c' 
  AND token = 'TfY12PFKrfesxruLDg4hubRmaZsOQ+1UtYSM+seCuI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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