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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ac05a42c72b6c9f4791bd4c5bbabe1b664d4ea50b896aa178ba394ea4cf4d4ba' 
  AND token = 'Vbe+5K2I5RbSjaJDPK3Aa8/Ke5jeVWjHRMGs+uLWPNE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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