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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ba07e23feaceebeb6774659a8f417d4e52bed96cb82619a5bc98edf71c955d61' 
  AND token = 'yEOyBH4Vg5HPd8yqyUt2XqyUHCCNRs6FYX1M6LRP4+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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