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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67315e8634855918a2ca1b1bfad113cabb38a0b09f24ec8923e300a3bfff8f54' 
  AND token = 'ce6lzfIrcqwPbBUhHc1+VeKn3G0SO/SyJiNwRMreG2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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