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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09060fa383ef47fd2d5ae9fb78804d5a8ca2afcbd151f292cfaf68f7fe059940' 
  AND token = '+OsC2mc9fOw7LI+E95MxkeGovBqjOJEzGQtxvrNCulk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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