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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67c20fdbb27f8f19008e129c1dcbe354bf4191b9097fb041941d524958504c17' 
  AND token = '0+iN2Tclk512eb2M4yYA6dTbF3heJeM7wT8M1JrVgoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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